Cutting machine



5 Sheets-Sheet l 13. Zz/afla I 7 Aug. 12, 1952 B. B. JuNkuNc ET AL CUTTING MACHINE Filed March 15, 1948 5 Sheets-Sheet 2 B. B. JUNKUNC ET AL CUTTING MACHINE Aug. 12, 1952 Filed March 15, 1948 I I JNVENTORS i 96h -t uu awa 7 x2, 7/3 wwok. ble/41w 023752; 49

1952 B. B. JUNKUNC ETAL 2,606,613

CUTTING MACHINE Filed March 15, 1948 5 Sheets-Sheet 5 IN V EN TOR-S.

5 Sheets-Sheet 4 mm ww I-iil. =I

Aug. 12, 1952 Filed March 15, 1948 INVENT RS.

yaaaqgZ/ 7/4 W i W g- 1952 B. B. JUNKUNC ETAL 2,606,613

CUTTING MACHINE Filed March 15 1948 5 Sheets-Sheet 5 INVENTORS.

Patented Aug. 12, 1952 UNITED STATES PATENT OFFICE CUTTING MACHINE Bela B. Junkunc and Walter Mazanek, Chicago, Ill., assignors to Bela B. Junkunc, Alexander Junkunc, Sr., Alexander Junkunc, Jr., and Joseph G. Junkunc, a partnership doing business as J & J Tool & Machine C0,, Chicago, Ill.

Application March 15, 1948, Serial No. 14,946

21 Claims.

ends of the cut tubing, because of the time and labor required to straighten the edges after the cutting operation.

The present invention embodies means for securely holding or clamping metal tubing, of round, square, rectangular or cross sectional shape, on all sides, and then cutting it in the main substantially outwardly from the inside of the tubing. The tubing is first pierced by a lance which continues in a predetermined path of travel, lancing one edge of the tubing with a continuous outward thrust as it completes its travel. A cutting blade then enters the slot formed by the lance and severs the remaining sides of the tubing, cutting outwardly at every point of contact.

If the cuttin machine is to be used to cut rolled or formed sections that are already provided with a slot, the lancing operation may be dispensed with and the cutting blade may be arranged so as to enter the section through the preformed slot.

The clamping jaws, lance, and cutting blade are operatively interconnected in such a manner that a single stroke of the handle will successively move the clamping jaws to closed position, move the lance through one edge of the tubing, and then move the cutting blade through the remaining walls of the tubing without deforming the edges of the tubing adjacent the cut.

The structure by which the above operations are attained will be described in the following specification, taken in conjunction with the accompanying drawings, in which:

Figure 1 is a cros sectional view through the cutting machine with the clamping jaws in open position;

-Fig. 2 is a view, similar to Fig. 1, with the clamping jaws closed and the lance in the position occupied by it at the time of the initial piercing operation, the path of travel of the lance being illustrated by a dotted outline showing the position of the lance at the finish of the lancing operation;

Fig. 3 is a fragmentary cross sectional view showing the cutting blade at the point of initial entry into the slot formed by the lancing operation;

Fig. 4 is a view, similar to Fig. 3, showing the position of the cutting blade after the tubing has been completely severed;

Fig. 5 is a side elevation of the cutting machine with the clamping jaws closed and the cutting blade in the position occupied by it after the cutting operation;

Fig. 6 is a fragmentary perspective view showing the lance and the tubing in their relative positions at the start of the lancing operation;

Fig. 7 is a view, similar to Fig. 6, showing the lance in the position occupied by it after the lancing operation has been completed;

Fig. 8 is a view, similar to Figs. 6 and 7, showing the cutting blade just after its initial entry into the tubin through the slot formed by the lancing operation;

Fig. 9 is a side elevation of the cutting machine with the tubing clamped in position for the laneing and cutting operations, with the linkage shown in dotted lines in the position assumed by it just prior to the start of the lancing operation;

Fig. 10 is an end view of Fig. 9 looking to the left of Fig. 9;

Fig. 11 is a cross sectional view taken along the line |ll| of Fig. 1;

Fig. 12 i a cross sectional view taken substantially along the line I 2-42 of Fig. 9;

Fig. 13 is a cross sectional view taken substantially along the line l3--l3 of Fig. 5;

Fig. 14 is a cross sectional view taken substantially along the line l4l4 of Fig. 5;

Fig. 15 is a fragmentary perspective view showing the cutting machine with its associated tubing supporting structure;

Fig. 16 is a fragmentary perspective view of the metal tubing with which the cutting machine is adapted to be used;

Fig. 17 is a fragmentary detail perspective view of the notched stop plate showing the undercut notch; and

Fig. 18 is a detail perspective view of the pin which holds the lower end of the upper link and the upper end of the lower link together.

In the drawings, referring to Fig. 15, the cutting machine comprises a housing 2 having openings 3 on each side. Supporting shelve 4 and 5 each have one end supported by the bottom edge of one of the openings 3 and their outer ends supported on legs 6. Shelf is provided with a plurality of L-shaped members 1 on its upper surface to form a support for the tubing 8 to hold it properly in alignment with the aperture 9 between the clamping jaws, hereinafter described. A side gage Iii, mounted on shelf 4. is clamped into position to provide a stop against which the end of the tubing abuts to regulate the length of the pieces cut therefrom. The side gage may be of any suitable construction, the only requirement being that the gage be simple, easily adjusted to any position laterally of shelf 4, and that it will remain positioned after it has been properly set. I

Shelf 4 may be provided with linear markings to show the precise distance of gage II] from the clamping jaws. If desired, this shelf may be made integral with shelf 5 and the shelf may extend through a suitable opening in the hous- The top wall H of housing 2 has a vertical slot l2v through which a handle l3 projects. Slot l2 extends downwardly from the top a substantial distance through front wall i4 and also through the rear wall to provide sufiicientclearance so that handle l3 may be moved through an are great enough to permit complete severance of tubing 8. As shown in Fig. 5, handle I3 is s cured to a cutting blade I 5 by means of screws l 5 which pass through apertures I! in shank l8 of cutting blade 15. The lower end of handle I3 is preferably bifurcated to straddle shank I8.

Cutting'blade I5 is pivotally secured, by means of a pin 19 (Fig. 13), between two upper fixed clamping jaws 20 and 21 which cooperate with lower movable clamping jaw 22 and 23 to hold tubing 8 while it is being cut. Jaws 29 and 2| are duplicates of each other and jaws 22 and 23 are also duplicates of each other. Each pair of jaws is spaced apart a distance substantially equal to the thickness of cutting blade [5 and one jaw of each pair is in the same vertical plane as the corresponding jaw of the other pair. Upper jaw 20 is secured to aside plate 24 by means of flat head screws 25 and 28. Upper jaw '2! is similarly secured to side plate 21, which is a duplicate of side plate 24, by means of flat head screws 23 and 29. The ends of pin I9 are fixed in apertures in side plates 24 and 21.

Side plates 24 and 2'! are secured at their bottom edge to a base plate 39. Bolts 3l and 32 secure the upper edges of the side plates to each other. 'A spacer 33 encircling bolt SI and a similar spacer 34 encircling bolt 32 keep the upper edges of the side plates spaced apart a distance equal to the combined thickness of cutting blade 15 and upper-clamping jaws 20 and 2!.

Lower movable clamping jaws 22 and 23 are pivotally secured between side plates 24 and 21 by means of a bolt 35. The lower edges of side plates 24 and 2'! are additionally secured to each other by bolts 36 and 31 which pass through apertures 38 and 39, respectively, in lower clamping jaws 22 and 23. Spacers 40 and 4!, encircling bolts 36 and 31, respectively, keep the lower edges of the side plate spaced apart the same distance as the upper edges. Apertures 38 and 39 are elongated slightly to. permit the necessary pivotal movement of lower clamping jaws 22 and 23.

The upper edge 42 of each lower clamping jaw is shaped to fit the contour of the lower edge 43 of each upper jaw over a substantial portion or" their meeting edges. At the portion in alignment 4 with opening 3 in housing 2 the upper edges of the lower jaws and the lower edges of the upper jaws are cut away, as indicated at 44 and 45, respectively. When the jaws are closed cut away portions 44 and 45 cooperate to form openings 9 substantially equal in cross sectional area to the cross sectional area of tubing .8. Side plates 24 and 2'! are also provided with openings 46 laterally aligned with openings 3 and 9. Opening 9, when the jaws are open, is slightly larger than the cross sectional area of tubing 8 so that the tubing may be ireely slid through this opening. The lower rear edge of lower clamping jaws 22 and 23 are apertured, as indicated at 4'! and 48,'Figs. l and 12, to receive a bolt 49. Apertures i! and 48 are elongated slightly for a purpose hereinafter described. A yoke 59 has its upwardly extending sides 51 and 52 apertured to receive bolt 59 also. Bolt 49 also passes through the lower ends of links 53 and 54 which are positioned adjacent the outer surfaces of sides 5| and 52 of yoke 55. Side plates 24 and 27 are notched, as indicated at 55, to permit a limited upward movement of bolt 49.

The upward movement of bolt 49 is opposed by a heavy coiled compression spring 56 which is positioned between two washers 5'1 and 58. Washer 57 is threaded on a bolt 59- threaded through the bottom of yoke 55. Bolt 59 projects upwardly through washer 5'! and a portion of coiled spring 56. Washer 53 has a stub 5i projecting downwardly to enter the upper end of spring 55. A pin 62 projects upwardly from washer 53 and fits between the lower edges of jaws 22 and 23 to position the upper end of s ring 56 beneath these jaws.

The linkage which controls the movement of jaws 22 and 23 is duplicated on both sides Of the cutting machine, so only the linkage adjacent side plate 2'! willbe described. Link 53 extends upwardly along the outer surface of side plate 2'! and is bent angularly, in its own vertical plane, to clear apertures 3, 9 and 45. The central portion of link 53, adjacent apertures 3, 9 and 4G, is cut away, as indicated at 63, to provide clearance for tubing 8, which projects through these apertures, during the cutting operation. The upper end of link 53 is pivotally connected to another link 64, substantially at its central portion, by means of a pin 65, shown in detail in Fig. 18.

The outer end of pin 55 is apertured, as shown at 66, to receive a cotter pin 5! (Fig. 9) to prevent separation of links 53 and 54. The inner end .of pin 55 is provided with a circumferential flange 68.

A stop member 65, secured to the outer surface of side wall 2?, is provided with anotch 16 which is engaged by pin 65 just after the clamping jaws have been closed and before the lancing operation starts. The inner surface of stop member 59 is undercut adjacent notch 10,- as indicated at H in Fig. 1'7, and flange 68 engages the undercut portion to aid in holding the parts together more. securely during the laneing and cutting operations. The pin. I 9 which constitutes a fixed pivot for cutting blade I5 is positioned in axial alignment with notch 78 so that when pins 55 move into notch 70 both pins 55 and pin it are in one straight line.

Link 54 is pivotally secured at its upper end to cutting blade l5 by means of a bolt 12 which extends through cutting blade 15 andv link 13 on the opposite side of the machine. Link 13 is a duplicate of link 54. The lower end of linkfir'i is bent at right angles to form an abutment-l4 engaging the edge of linkf53 to push it past its dead center and cause pin 65 to engage notch III as soon as the lower clamping jaws have been closed so that cutting blade I5 will function properly.

When tubing 8 is inserted through apertures 3, 9 and 46, lower jaws 22 and 23 are closed by rotational movement of handle I3 forwardly, or to the left as viewed in Figs. 1, 2, 5 and 9. Abutment I4, pressing against the outer edge of the upper half of link 53 causes links 53 and 64 to move as a unit about bolt 49 as a pivot. The same movement of handle I3 also rotates cutting blade I5 about its pivot I9. Rotational movement of links 53 and 64 about the pivot 49 lifts these links up to the dead center when bolt I2 is indirect vertical alignment with bolt 49. Since link '53 is connected to lower clamping jaws 22 and 23 by bolt 49-, the lower clamping jaws are also raised with links 53 and 64. i

The movement of lower clamping jaws 22 and 23 is about bolt 35 as a pivot and the distance the jaws move is such that upper edge 42 engages lower edge 43 of upper clamping jaws 28 and 2| just before links 53 and 64 reach dead center. Spring 56 exerts a constant force against washers 51 and 58, tending to force them apart, thereby keeping the lower edges of apertures 41 and 48 in contact with bolt 49 until lower clamping jaws 22 and 23 are closed. Continued rotation of handle I3 after the clamping jaws are closed raises links 53 and 64 against the action of spring 56. Yoke 59 and bolt 49 also move with link 53 until bolt 49 engages the upper edge of apertures 41 and 48. Notches 55 in side plates 24 and 21 are deep enough to provide sufficient clearance for this additional movement. As links 53 and 64 pass their dead center position pins 65 engage notches I in stop members 69, and since rotational movement of handle I3 no longer raises the links, spring 56 pulls the links downwardly to hold pins 65 against stop members 69 with flanges 68 seated in undercut portions II of notches I0.

When pins 65 engage stop members 69 rotational movement of the links 53 and 64 around pivot 49 is no longer possible and link 64 moves with outing blade I about an axis formed by the coincidence of pin I9 and pins 65. This pivotal movement of link 64 causes abutment I4 to move away from the outer edge of link 53 until the cutting operation is completed and the. parts are in the position shown in Fig. 5. Link 53 and 64 are made as separate members connected together by pin 65, instead of being made as a single link, so that blade I5 may be rotated about its pivot I9 after pin 65 engages notch IO. U

The cutting portion of blade I5 comprises a finger-like projection I5 extending to the left and downwardly, as viewed in Fig. 1. This projection tapers somewhat towards the end so that the portion closest to the body of the blade is thicker than the free end. The upper edge I6, as viewed in Fig. 1, of projection I5, is substantially arcuate. Thelower edge 89 is of slightly irregular contour so that as the edge I6 cuts through the bottom of tubing 8, edge 89 will out through only a small portion of the top of the tubing. The end of projection I5 has a slight bulge I8 which engages the upper edge of lance I9.

Lance I9 is pivotally secured at one end between side walls 24 and 21 by means of a pin 8|. It is positioned in the same vertical plane as cutting blade I 5 between the vertical planes of the clamping jaws. The free edge of lance I9 terminates in a downwardly extending point=t82 normally positioned over the forward edge of tubing 8 held by the clamping jaws. When lance I9 is in its normal position its upper edge '83 engages spacer 33 which prevents any upward movement past the normal. position. Lower edge 84 of lance I9 has a shallow notch 85 engaged by a pin 86. Pin 86 is mounted in a housing 8I (Fig. 11) which has a downwardly extending open well 88. A coiled spring 89, having one end seated in well 88 and its other end in a recess 90 in base 30, urges lance I9 upwardly to move it back to its normal position after cutter blade I5 has been rotated out of the way.

When a piece; of tubing 8 is to be cut it is inserted through apertures 3, 9 and 46 so that the portion to be cut is between clamping jaws 29 and 2| and 22 and 23. Handle I3 is rotated forwardly and cutter blades |5,movingaround pivot |9,raises lower jaws 22 and 23 through the action of links 53 and 54 and 64 and I3. When the upper edges oflower jaws 22 and 23 engage the lower edges of upper fixed jaws 20 and 2|, the upward move ment of links 53 and 54 and 64 and I3 continues a-short distance until bolt 49 reaches the upper edge of apertures 41 and 48 and spring 56 is compressed. Continued rotation of handle I3 causes pin 65 to move into notch I8 in stop member 69. In this position flange 68 is seated in undercut portion H and spring 58 exerts force urging pin 65 downwardly to hold it securely in notch I0. Further movement of links 53 and 54 and 64 and 13 in the same direction is impossible. Continued rotation of handle I 3 moves cutting blade I5 and link 64 about pivot I9.

When cutting blade I5 is rotated about pivot I9 after pin 65 engages stop member 69, bulge I8, which is part of end 11, engages the top edge 83 of lance I9 and forces point 82 to pierce the upper forward edge of tubing 8. This initial piercing operation is shown in Fig. 2. As cutting blade I5 continues rotating about pivot I 9 its edge I8 forces lance I9 downwardly around pivot 8| until the front edge 9| of tubing 8 is lanoed entirely across its surface as shown in Fig. 7. The lancing is done by the lowermost edge of lance I9 adjacent point 82. As may best be seen in Fig. 2, this portion of cutting edge 84 is curved upwardly, as indicated at 93, so that the entire lancing operation is accomplished with the edge 93 cutting outwardly against edge 9| of the tubmg.

As shown clearly in Fig. 7, the lancing operation leaves a slot 94 entirely across wall 9| equal in'width to the thickness of lance 19.: Lower clamping jaws 22 and 23 are recesses, as indicated 7 at 95 (Figs. 1, 2 and 12). The metal-removed from tubing 8 to form slot 94 is pushed by edge 84 to the top of recesses 95. The total'width of recesse 95 and the space between jaws 22 and 23 is sufiicient so that the scrap from slot 94 falls through. Base 30 has a plurality of aper- 1 interior of tubing 8, starting from the upper end of slot 94. As previously stated, the contour of edges I6 and '88 is such that edge I6 cuts entirely through bottom wall 9! while edge 80'cuts through only a small portion of upper wall-98.

Wheniend111,118reaches-rear wall 99 of ,itubin 8 it cuts? through with the same: outward thrust: used throughout the cutting operation; After wall 99 has-been cut, edgeBU; which is then moving: substantially vertically, finishes cutting through upper wall: 98; to. completely sever the tubing; The clamping jaws hold tubing 8 on both sides of cutting blade I5 so close to the blade that the; tube isnot deformed outwardly during the lancing'or; cutting operation. The outward thrust of bothlance andcutting blade eliminates any possibility of inward deformation of the tubing.

Lower jaws:22 and'23 are provided with recesses 100 and NH (Fig. 12) to permit'loose scrap from thecutting operation -to fall through. Any scrap that'is-not previously ejected from the machine, is ejected through recesses I02 and I03 inupper clamping jaws 20 and 2| upon completionxof .the cutting operation.

Afterithe tubing has been'completely severed; handle I3 is moved back to its initial position. This; movement carries cutting blade 15 in a re-v verse direction around pivot i9 until dead center of links 53 and 54 and 64' and 131s reached.

Pins 65 are then disengaged from notches l and blade I 5 is rotated about pivot I9 until its initial positionis reached. The reverse movement about pivot l9-;also moves lower clamping jaws 22 and 23 backto open position. As soon as projection moves out of contact with lance l9, spring 89 ,moves lance '19 back toits initialposition.

Although we have described a preferred embodiment of our invention in considerable detail,

it will be understood that the description is intended to be illustrative, rather than restrictive,

as many details may be. modified or changed without departing fromthe spirit or scope of our, invention. Accordingly, we do not desire to be restricted to the exact structure described, ex-

cept as limited .by the appended claims.

We;claim:.

1. In. a cutting machine, a lance, a pivotedv cuttingv blade'and' a handle secured thereto to facilitate pivotal movement thereof, said cut-' tingybladebeing positioned above said lance in the plane thereof whereby it engages said lance during the first portion of its pivotal movement to push saidlance through a portion of the object:to;be out, said cutting blade engaging the object to be cut at the lanced portion thereof after said lancing operation to completely severit;

2; In .a vcuttingmachine, a lance, abutting blade; positioned above said lance in the same plane,,.said.blade engaging said lance upon actuation of said cutting blade to force said lance through af-portion of the object to be out before the cutting operation, said cutting blade engaging the object to be cut through said lanced portion and cutting the remaining portion of said object, and spring means for returning said lance to its initial position after return of said cutting blade to its initial position.

.3. In a cutting machine, a lance, a spring holding said lance in predetermined position, a cutting, blade and means for moving said cutting blade into direct engagement with said lance to move it from said predetermined} position against the action of said spring to lance the object to be out, said cutting blade moving said lance out of lancing position and engaging the lanced portion-of the object to be cut to completely sever the object tobe out, said spring automatically'returning said;lance to said predetermined position after said cutting blade has been returned to its initial position. v

4.111 a cutting machine, a base, a pair of spaced side plates secured to said base, a lance pivoted at one end between said side plates, the free end of said lance terminating in a sharp point positioned adjacent an object to be cut, a I

spring having one end bearing against the lower edge of said lance intermediate its length and its other end bearing against said base, and a cutting blade pivoted between said side plates, said cutting blade engaging the upper'edge of said lance to force said pointed end into the object to be out upon pivotal movement of said cutting blade, continued pivotal movement of said cutting blade forcing said lance out of engagement with the object to be cut and moving said cutting blade into engagement with the object to come pletely sever it.

5. In a cutting machine, a base, a pair of spaced side plates secured to said base, a lance pivoted at one end between said side plates, the free end of said lance terminating in a sharp point positioned adjacent an object to be out, a spring having one end bearing against the lower edge of said lance intermediate its length and its other end bearing against said base, and a cutting blade pivoted between said side plates, said cutting blade engaging the upper edge of said lance to force said pointed end into the object to be out upon pivotal movement of said cutting blade, said cutting blade remaining in engagement with said lance upon continued pivotal movement of said blade to disengage said lance from said object and engaging said object at the lanced portion to cut therethrough upon continued pivotal movement of said blade after said lance is disengaged from said object.

6. In a cutting machine, a lance and a cutting blade, said lance being positioned in the path oftravel of said cutting blade and directly actuated by said cutting blade to lance the object to be out before said cutting blade engages said object, continued movement of said cutting blade.

being effective to completely sever the object.

7. In a machine for cutting metal tubing, a lance, a cutting blade directly engageable with said lance and movable to forcesaid lance through one portion of said tubing and to move said lance out of engagement with said tubing, said cutting blade engageable with the interior of said tubing through said lanced portion after said lance has been moved out of engagement with said tubing and operable to sever the remaining portion of said tubing, the thrust of said blade against said tubing being in an out- 1zwar ld direction at each successive point of con-- 8. In a machine for cutting-metal tubing, a

pair of side plates, a lance pivoted between said side plates, the free end of said lance terminating in a sharp point positioned adjacent a piece of tubing held in said machine, rotation of said until the lancing operation is completed, said projection then entering the slot made by said lancing operation upon continuation of the rotary movementof said blade, the edges of said'projection thrusting outwardlyagainst the remaining portion of the tubing to co'mplete the cutting operation.

9.- In acutting machine, a lance, a pivoted cutting blade, a movable clampingj'aw and a link connectiOncomprising a pivotally connected pair of links, one of said links being connected adjacent one endj to said 'movable jaw and, said other link beingf connected adjacent its oppo- ,-site end to said cutting blade, said link connec tion..between-. said jaw and said blade causing saidjaw tomove to closed positionfupon pivotal movement of said cutting blade before the cutting operation, said lancebeing engaged by said blade and moved thereby through a portion of the'vobject to becut after said jaw ha s been moved'to closed position and before said" blade reaches cutting position,'continued pivotalmovement of said cutting blade being effective to completely sever the object to be cut. .10. In a cutting machine, a pair of side plates,

a fixed clamping jaw, a second clamping jaw movable to coopera'te with said fixed jaw to hold a tubular member, a lance mounted betweensaid side plates, and a pivoted cutting blade mounted above said lance in proximity thereto and in vertical'alignment therewith, whereby pivotal movementof said cutting blade actuates said lance to lance one portion'of said tubular member, and

a fixed clamping jaw, a second clamping jaw movable to cooperatewithsaid fixed jaw to hold a tubular member, a lance mounted between said side; plates, a pivoted cutting, blade, a link on nection between said cutting blade and said second clamping jaw, pivotal movement of said cutting blade successivelyj moving said second clamping jaw to clamping position, actuating ,said lance by direct engagement therewith to lance one portion of said tubular member, movingpart of said blade "into said lanced portion of said tubular member, and completely severing said unlanced portion of said tubular mem- 12. In a cutting machine, a pair of side plates, a pair of fixed clamping jaws mounted in spaced relation between said side plates, a pair of movable clamping jaws cooperating with said fixed jaws to hold an object to be cut, a lance and a cutting blade each pivoted separately in the space between the jaws of each pair of jaws, said cutting blade being positioned above said lance and in proximity thereto whereby pivotal movement of said cutting blade causes said blade to engage said lance and actuate it to lance said object to be out before said blade engages said object to be cut, and a link connection between said blade and said movable jaws whereby pivotal movement of said blade moves said movable jaws to closed position before said blade actuates said lance, continued pivotal movement of said blade after it engages the object to be out being effective to completely sever the object.

13. In a cutting machine, two pairs of spaced jaws operable to clamp an object to be out therebetween, a lance and a cutting blade each pivoted to rotate in the plane between said spaced jaws, said blade in its pivotal movement enga ing said lance to force said lance through a 11. In a cutting machine, a pair of side plates,

.portion of said object to be cut and engageable, upon continued-pivotal 'movement, with said l'anced portionto completely sever'salid' object. "14. In a cutting machine, two ,p'airsof spaced [jaws operable to clamp an object to be out there-- between, a lance and a cutting blade each pivoted to rotate in the plane between saidspaced 'jaws, said blade in its pivotal movement engagcontinued pivotal movement, with the interior ing saidflanc'e to force "said lance througha portion of said object to be cut and engageableupon or saidobject through said lanced portion to completely sever said'object by cuttingoutwardly 'from said interior.

15. In a cutting machine; a pair of side plates, a fixed clamping jaw, a movable clamping jaw cooperating withsaidfixedjaw to hold an obj. 'ject to be cut, a cutting bladepivoted between Tfsaid.sidejplateafa pair'oflinks connected at 20, {Iat'jits other end to 'saidblade, said othertlink one end by a pin, oneof said links connected being 'c'onnectedat' its other end to said movable jaw, said links being effective upon'movement of said blade to move said movable jaw to closed L position before said bladeengagesf the Object to be cut, anda stop plate engaging, said pin after said movable jaw has been moved to closed posi- "tion; said'blade being pivotally. movable into engagement with said object to be out after said pin engages said stop plate.

'16. In a cutting machine, a pair of side plates,

a fixed clamping jaw, a movableclamping jaw j cooperating with said fixed jaw to hold an object jto be cut, a'eutting blade pivoted between said s'ide,plates,a pairof'links connected at one end by a pin, one ofsaid links connected at its other end to said blade, said other, link being connected at its other end to said movablejaw,.said links being effective upon movement of said blade to move said movable jawto closed position be- .fore said blade engages the'object to. be ,cut,

and a stop plate provided witha notch having its inner edgeund'ercut, a yoke secured to said movable jaw, ,a spring mounted in said yoke,

said yoke being'movable against'said spring a short distance topermit ajslight movement of said links after said movable jaw is. closed, said pin'having a flanged end engageable with said undercut portion of said notch, said spring exerting continuous force to hold said pin in said notch, said blade being movable about a different pivot when said pin is in engagement with said notch.

17. In a cutting machine, a rotatable cutting blade, a stationary clamping jaw, a movable clamping jaw, a pair of links, and a pin connecting said links together, one of said links being connected to said blade and the other link being connected to said movable jaw, said links being operable as a unit, upon rotation of said blade, to move said movable jaw into clamping relationship with said stationary jaw, and a stop member engaging said pin after said jaws are in clamping relationship to prevent further movement of both said links as a unit, said cutting blade being capable of further rotation after said stop member engages said pin.

18. In a cutting machine, a pair of side plates, a pair of fixed clamping jaws, a pair of movable clamping jaws cooperating with said fixed jaws to hold an object to be cut, the jaws of each :nected byseparate pins, each of said pairs of to the outer surface of one of said side'plates to engage said separate pins to limit the movement of said pairs of links as units.

19. In a cutting machine, a pair of side plates, 2; pairof fixed clampingjaws, apair of movable clamping jaws cooperating withsaid fixed. jaws tohold an'object to be out; the jawsofea'ch pair being spaced from each other, a cutting blade pivote'd between said fixed jaws, a pair of linkspositione'd adjacent the outer surface of each of sa'idsideplatesjthe links. of each pair "being connected by separate pins, each of said ',pa'irs of links being movableas a unit, a'bolt ex- .ftending through theupper'e'nds' of each o f'said pairs of links," side 'plates,'fixed 'clamping'jaws and cutting blade to secure the upper ends of each of said; pairs of links to. 'saidcutting blade,

and another bolt extendingthrodgh the'lower ends of each of said pairsof'links and movable clamping jaws to connect the lower'ends' of. each of said pairs of links to said movable clamping jaws, the apertures inisaidi.movable'clamping plates through whichsaidsecond' mentioned bolt extends being elongated. slightly to permit 'a 'slight'movem'ent of said links as units'after said movable clamping plates to closed position.

' 20. .In a cutting machine, a pair of side plates,

have been moved a pair of fixed clamping jaws, a pair of movable clamping. jaws 'cooperatingwith' said fixed. jaws toholdan object to'be' cut, the jaws of. each pair being spaced from "each j other, a cutting blade pivoted between said 'fixed jaws, Ia pair of links positionedladjacent the'outer surface of .each of .said side, plates, the'links of. each .pair ibeingiconnecte'd' by separate pinsjeach of said Number file of this patent:

pairs of linksxbeing movable as a"unit,- eachof said pins having a flangedend, the upper ends of said links being connected to saidcutting blade, a bolt extending through'apertures in the lower ends of each of said pairs of links and mov- "able clamping jaws to connect the'lower ends "after said movable clampinggplates'reach their closed position, a pair of stop members-each secured to the outer surface of' one 'of saidside plates, each of said stop members having an undercut notch to engage thefianged 'end" of one of said pins, and a spring acting against said links to hold said flanged pins in said notches to prevent further movementof said links as units.

21. In a cutting machine, a lance, and a pivoted cutting blade, said cutting blade being positioned adjacent said lance and shaped so that a portion of its peripheryengages said lance when said cutting blade is moved about its pivot, continued pivotal movement of said cutting blade forcing said lance through'a' portion'of the object to be cut and subsequently'forcing said cutting blade into the lanced portion and then through the remaining portion of said object to sever said object completely.

'BELA BIJU'NKUNC. 'WALTER .MAZANEK.

' REFERENCES CITED The following references are of record in the 'UNITED STATES PATENTS I Name a Date Re. 22,114 Borzym June 16, 1942 1,800,005 Braun Apr. '7, 1931 2,089,274 Laukhuff Aug. 10, 1937 2,234,999 Yoder Mar..18, 1941 2,243,614 Vogel Ma "27, 1941 2,250,931 Grieder. 'July 29,1941 2,325,990 Wales Aug. 3, 1943 

